Your 20s may feel far too early to worry about what your heart will look like decades later. Yet researchers have found a possible connection between the neighborhood a person lives in during early adulthood and signs of cardiovascular disease that appear much later.
A study published in Nature Communications found that people exposed to more adverse neighborhood conditions as young adults were more likely to develop coronary artery calcification (CAC) by midlife. CAC occurs when calcium builds up in the walls of the arteries that supply blood to the heart, providing a measurable sign of underlying coronary artery disease.
The finding adds an unusual piece to the familiar heart-health story. Researchers have spent years examining what individuals eat, how much they exercise, and whether they smoke. This time, they looked at something less personal but potentially just as influential: the environment surrounding those choices.
The Neighbourhood May Matter More Than A ZIP Code
The researchers used data from the Coronary Artery Risk Development in Young Adults (CARDIA) study, a long-running project that has followed adults from young adulthood into later life.
Rather than judging a neighborhood by one characteristic, the team developed an index that combined several social and environmental factors. These included socioeconomic conditions, access to food, availability of places for physical activity and crime rates.
The researchers then examined whether those conditions were associated with CAC measured during follow-up.
They found that greater exposure to adverse neighborhood conditions in early adulthood was associated with a higher risk of developing coronary artery calcification later in life. The association was also stronger among Black participants than among white participants.
That does not mean living in a particular neighborhood will determine whether someone develops heart disease. The study was observational, so it cannot establish that neighborhood conditions directly caused the calcium buildup.
It does, however, suggest that cardiovascular risk may begin taking shape through circumstances that are not entirely within an individual's control.
Why The 20s Could Be A Critical Window
The timing fits with another line of research emerging from the same CARDIA cohort.
A Harvard-affiliated study published in 2025 found that cardiovascular-health patterns established during young adulthood were strongly associated with the risk of heart disease, stroke and death decades later. People whose cardiovascular health declined between their 20s and 40s faced substantially higher risks than those who maintained healthier profiles.
That research focused on individual health measures, including diet, physical activity, sleep, blood pressure, blood sugar, cholesterol, body mass index and tobacco exposure.
A separate Boston University analysis also found that changes in cardiovascular health during young adulthood could have consequences much later, with even modest improvements in lifestyle associated with lower future cardiovascular risk.
Taken together, these findings make the new neighborhood study more interesting. The choices people make in their 20s may matter, but those choices are also shaped by the places where people live.
When The Environment Shapes Everyday Choices
A neighborhood can influence health without directly affecting the body.
Someone living near affordable grocery stores may have more opportunities to buy fresh food. Access to safe parks, walking routes or recreation facilities can make regular physical activity easier. Crime, meanwhile, can affect whether people feel comfortable spending time outdoors.
The new study did not establish that any one of these factors was responsible for the higher CAC risk. Instead, the researchers combined several neighborhood characteristics to capture the broader social environment in which people were living.
That distinction is important because the same neighborhood can affect different people in different ways. Individual health behaviors, socioeconomic circumstances, and other factors all overlap with the places people call home.
The researchers were interested in that combined picture because previous research has often examined neighborhood characteristics separately. Their index offered a way to look at several conditions together and follow their relationship with cardiovascular health over time.
What Calcium In The Arteries Can Reveal
CAC is not the same thing as having a heart attack, and finding calcium in the coronary arteries does not mean one is inevitable.
Instead, it is a marker of atherosclerosis, the gradual process in which plaque builds up inside arteries. As calcification increases, so does the concern about future cardiovascular disease.
That made CAC particularly useful for this research. A person can feel perfectly healthy while changes are already taking place inside the arteries.
By connecting those measurements with information about where participants lived when they were young adults, researchers could examine whether early environmental conditions were associated with a biological change that emerged years later.
The study therefore does not suggest that a neighborhood permanently "damages" the heart. It points to a more complicated possibility: repeated exposure to social and environmental conditions may contribute to cardiovascular risk over the course of a lifetime.
The Question Researchers Want To Answer Next
The next challenge is working out what can be changed.
The researchers say their findings could eventually contribute to more context-aware approaches to assessing cardiovascular risk, rather than relying entirely on individual characteristics. They also want to understand whether changes in neighborhood conditions over time are associated with changes in cardiovascular outcomes.
That could broaden the way heart-disease prevention is discussed.
Eating better, exercising, and avoiding tobacco remain important. But those recommendations look different when viewed through the lens of someone's surroundings. Access to healthy food, safe places to exercise and other community resources can determine how realistic those choices are in everyday life.
For people in their 20s, the heart problems associated with aging may seem distant. The CARDIA findings suggest that the story may already be unfolding, not just through personal habits, but through the environment in which those habits take place.
The neighborhood may not determine a person's cardiovascular future. But researchers now have another reason to ask whether the place someone calls home can leave a lasting mark on the heart.
